Title: Fatal Error in core.php
Last modified: April 3, 2019

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# Fatal Error in core.php

 *  Resolved [N1ghteyes](https://wordpress.org/support/users/n1ghteyes/)
 * (@n1ghteyes)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/fatal-error-in-core-php/)
 * Hi,
 * I’m seeing a Fatal error with the latest version of the plugin.
 * [03-Apr-2019 15:58:44 UTC] PHP Fatal error: Uncaught Error: Class ‘KubAT\PhpSimple\
   HtmlDomParser’ not found in /****/*****/public_html/wp-content/plugins/wp-retina-
   2x/core.php:104
 * This appears to be an issue with the use of a third party composer package loaded
   with PSR-0. Any suggestions of a solution, or could you push an update with a
   fix?
 * Thanks

Viewing 6 replies - 1 through 6 (of 6 total)

 *  [plumbweb](https://wordpress.org/support/users/plumbweb/)
 * (@plumbweb)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/fatal-error-in-core-php/#post-11389684)
 * I’m experiencing the same thing with the latest update.
 *  Plugin Author [Jordy Meow](https://wordpress.org/support/users/tigroumeow/)
 * (@tigroumeow)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/fatal-error-in-core-php/#post-11389706)
 * Hi [@n1ghteyes](https://wordpress.org/support/users/n1ghteyes/), [@plumbweb](https://wordpress.org/support/users/plumbweb/),
 * What version of PHP are you using? I can’t reproduce the issue at all on my side,
   so it’s hard to find ways to resolve the issue. It might be that your version
   of PHP doesn’t support namespaces, but I am not 100% sure.
 *  [plumbweb](https://wordpress.org/support/users/plumbweb/)
 * (@plumbweb)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/fatal-error-in-core-php/#post-11389719)
 * It originally threw the error for me on PHP 7.2.0 on my local dev environment
   when I updated it.
 * I also just tried it on a clean install on a staging site – PHP 7.3.2. It changed
   the theme to a fresh install of TwentyNineteen with no other plugins and also
   deleted WP Retina 2x and reinstalled, but got the same error.
 *  Plugin Author [Jordy Meow](https://wordpress.org/support/users/tigroumeow/)
 * (@tigroumeow)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/fatal-error-in-core-php/#post-11390427)
 * Please contact me here: [https://meowapps.com/contact](https://meowapps.com/contact).
   I would like you to try a new version I made. For me, everything works so I need
   you to try it 🙂
 *  [plumbweb](https://wordpress.org/support/users/plumbweb/)
 * (@plumbweb)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/fatal-error-in-core-php/#post-11392434)
 * This is addressed in version 5.5.3.
 * Thanks for the quick fix [@tigroumeow](https://wordpress.org/support/users/tigroumeow/)!
 *  Plugin Author [Jordy Meow](https://wordpress.org/support/users/tigroumeow/)
 * (@tigroumeow)
 * [7 years, 2 months ago](https://wordpress.org/support/topic/fatal-error-in-core-php/#post-11394080)
 * You are welcome 🙂

Viewing 6 replies - 1 through 6 (of 6 total)

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## Tags

 * [fatal error](https://wordpress.org/support/topic-tag/fatal-error/)

 * 6 replies
 * 3 participants
 * Last reply from: [Jordy Meow](https://wordpress.org/support/users/tigroumeow/)
 * Last activity: [7 years, 2 months ago](https://wordpress.org/support/topic/fatal-error-in-core-php/#post-11394080)
 * Status: resolved